12

AT89C5132

4173CS–USB–07/04

Internal Pin Structure

Table 16. Detailed Internal Pin Structure

Notes:

1. For information on resistors value, input/output levels, and drive capability, refer to

the Section “DC Characteristics”, page 183.

allowing pseudo open-drain structure.

3. In Port 2, P

(A15:8).

Circuit

(1)

Type

Pins

Input

TST

Input/Output

RST

Input/Output

P2

(3)

P3

P4

P53:0

Input/Output

P0

MCMD

MDAT

ISP

PSEN

Output

ALE

SCLK

DCLK

DOUT

DSEL

MCLK

Input/Output

D+

D-

VDD

VSS

P

VDD

Watchdog Output

VSS

N

VDD

VDD

2 osc

Latch Output

periods

VDD

VSS

N

P

VDD

VSS

N

P

VDD

D+

D-